I know it wouldn't be very feasible in an APS sized camera. That's why I specifically mentioned that perhaps we might see such a feature in the reportedly upcoming 645D.
On Thu, May 21, 2009 at 9:37 AM, P. J. Alling <[email protected]> wrote: > 11mm of movement may not very much, except when you're talking about it in > terms of moving the APS-C sized sensor, within the camera body. Then you're > looking at a movement that's 45% of the sensor's long axis and 69% of it's > short axis, with a commensurate increase in the size of the mirror box, > mirror, prism, etc or a maybe a live view only camera, which would still be > larger than a K20D in most dimensions, except for possibly the lack of a > prism "hump". A specialized camera like that might be possible but not as > a general purpose SLR or even EVIL camera. > Now if you plan to use lenses for 24x36mm lenses you get 8mm of movement in > either direction, 33% movement in long axis and 50% on the short axis, but > Pentax seems to have stopped using the old 35mm mirror boxes and mirrors > with end of the *ist-D series. Now the K7d by all accounts, (well the two > I've read so far anyway), state the it's shutter and mirror are > exceptionally quite, which is probably made possible partly by it's APS-C > sized components. So why Pentax would give that up to build a camera with a > larger noisier shutter mirror assembly I cannot fathom. > If you want to use medium format lenses you can already get shift adapters > from Pentacon-6 mount to K mount. > > http://araxfoto.com/accessories/shift/ > > I'm sure you could have one made for 645 or 6x7 lenses. This likely to be > the state of art for some time to come. > > Adam Maas wrote: >> >> Enough to support 11mm of shift on a 35mm frame. There's a couple 35mm >> mount tilt/shift adapters available that use P645 lenses, usually the >> FA35. >> >> -Adam >> >> On Wed, May 20, 2009 at 10:02 PM, Nick Wright <[email protected]> >> wrote: >> >>> >>> Sure, do we know how large the image circle of a typical FA645 lens is? >>> >>> On Wed, May 20, 2009 at 8:56 PM, John Francis <[email protected]> wrote: >>> >>>> >>>> On Wed, May 20, 2009 at 08:49:54PM -0500, Nick Wright wrote: >>>> >>>>> >>>>> 8-11mm isn't a terrible lot of movement. >>>>> >>>>> I wonder how difficult it would be to implement a sensor shift of that >>>>> magnitude in say a medium format digital body? >>>>> >>>>> Can you imagine that? It wouldn't give you tilt control (but perhaps >>>>> that wouldn't be that hard to put in either?) but just think being >>>>> able to apply shift to any lens you put on the body? >>>>> >>>> >>>> That only works if the image circle of the lens is large enough, >>>> otherwise you're going to have serious vignetting problems. >>>> >>>> TANSTAAFL. >>>> >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> [email protected] >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>> follow the directions. >>>> >>>> >>> >>> -- >>> ~Nick David Wright >>> http://www.nickdavidwright.com/ >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >>> >> >> >> >> > > > -- > -- > > The free man owns himself. He can damage himself with either eating or > drinking; he can ruin himself with gambling. If he does he is certainly a > damn fool, and he might possibly be a damned soul; but if he may not, he is > not a free man any more than a dog. > > --G. K. Chesterton > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. > -- ~Nick David Wright http://www.nickdavidwright.com/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
